Are some of CSX's RDMT road slugs GP-30M that are rebuilt? Because here at the Hagerstown engine terminal, near the engine yard, you can see the east end of the large Hagerstown yard, and what I thought was a GP-30M but is a RDMT and a GP-40-2 do the east end switching. In the middle and west sections SD-50's and GP-40-2's switch. I've also seen this unit doing switching jobs on the disconnected segment of the Lurgan subdivision. Anyways, I looked on CSX photo archives and under RDMT's I saw what appeared to be something like a GP-39 and what appeared to be a GP-30M. Does anyone know if there are infact GP-30M's?